Environmental Studies Biogeochemical cycle

Environmental Studies Biogeochemical cycle

1. Module – 1 ENVIRONMENT AND ECOSYSTEM 1.1 Concept of Environmental System 1.2 Natural and Anthropogenic Environment 1.3 Components of Natural Environment 1.4 Concept and components of Ecosystem 1.5 Classification of ecosystems 1.6 Energy flow in the ecosystem 1.7 Changing man-environment relationships

2. Probabilism Approach that bridges between determinism and possibilism Man modifies the nature wherever necessary and sometimes adjust himself according to the nature. Neither man or nature is absolute controller. Stop and Go Determinism Use of natural resources when nature is favorable, stop using nature when it is unfavorable. Griffith Taylor

3. Summary: The energy flow of ecosystem refers to its functions. There are following forms of energy flow in the ecosystem. Food chain and Food web Bio-geo-chemical cycles The structure of energy flow in the ecosystem involves decrease in biomass/energy/number of individual organisms at higher trophic levels. This structure refer to “biomass / ecological pyramid”

4. Man – nature relationship has changed over the period of time. There are three approaches to study man-nature relationship: Environmental Determinism Possibilism Probabilism

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